Fluorescent lantern



FIG. 1 is a top, front and right side perspective view of the fluorescent lantern showing my new design;

FIG. 2 is a bottom, rear and left side perspective view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a top plan view thereof; and

FIG. 6 is a bottom plan view thereof. 

The ornamental design for a fluorescent lantern, as shown and described. 